36th round – [k2tog, k9] to end
37th round – k to end
When it will be too tight to knit on circular needles, switch to double pointed needles.
38th round – [k2tog, k8] to end
39th round – k to end
40th round – [k2tog, k7] to end
41st round – k to end
42nd round – [k2tog, k6] to end
43rd round – k to end
44th round – [k2tog, k5] to end
45th round – k to end
46th round – [k2tog, k4] to end
47th round – k to end
48th round – [k2tog, k3] to end
49th round – k to end
50th round – [k2tog, k2] to end
51st round – k to end
52nd round – [k2tog, k1] to end
53rd round – k2tog to end until you cover up the hole